Prelimary analysis of the teleseismic receiver functions of Ningxia and its adjacent area

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• 作者：Xiaoqing XuXuzhang Shen
• 会议时间：2012-05-15
• 关键词：receiver function ; Ningxia ; crustal thickness ; velocity ratio
• 作者单位：Xiaoqing Xu(Earthquake Administration of Ningxia HuiAutonomous Region, Yinchuan 750001, China)Xuzhang Shen(Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China)
• 母体文献：中国地震监测预报论坛暨中国地震学会地震预报专业委员会、地震观测技术专业委员会联合学术大会论文集
• 会议名称：中国地震监测预报论坛暨中国地震学会地震预报专业委员会、地震观测技术专业委员会联合学术大会
• 会议地点：石家庄
• 主办单位：中国地震学会
• 语种：chi

摘要

The teleseismic receiver functions of digital seismic network of Ningxia and its adjacent area are calculated with two different Gauss filter factors.The accuracy and stability of the receiver functions are discussed.The H-Kappa stacking method is applied to estimate the crustal thickness and velocities ratio beneath seismic stations.The results indicate that there are sharp changes of crustal thickness and velocities ratio in the studied region.This region is located in the northeastern margin of Tibet,and also a junction of several first-grade blocks.The large contrast of crustal structure in this region is considered to be resulted from the interaction of these blocks.Our results are helpful to construct the completed model of the formation and evolution of the Tibet.Some local structures are also discussed combining with the geological faults.